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authorJan Glauber <jang@linux.vnet.ibm.com>2010-02-09 08:46:08 (GMT)
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-02-09 08:46:23 (GMT)
commit959153d34544b7237bad263e73a5abdf94fc7722 (patch)
treeee34df4e1bfa34024a96e822633a2b22a6091269
parent4c52228d1b83ef67d4fa381c2ade70122c9e3c34 (diff)
downloadlinux-959153d34544b7237bad263e73a5abdf94fc7722.tar.xz
[S390] qdio: prevent call trace if CHPID is offline
If a CHPID is offline during a device shutdown the ccw_device_halt|clear may fail and the qdio device stays in state STOPPED until the shutdown is finished. If an interrupt occurs before the device is set to INACTIVE the STOPPED state triggers a WARN_ON in the interrupt handler. Prevent this WARN_ON by catching the STOPPED state in the interrupt handler. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--drivers/s390/cio/qdio_main.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 5781c5d..62b654a 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -960,6 +960,8 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
qdio_handle_activate_check(cdev, intparm, cstat,
dstat);
break;
+ case QDIO_IRQ_STATE_STOPPED:
+ break;
default:
WARN_ON(1);
}